Carbureter.



L. J. LE PONTOIS.

CARBURETER. v

APPLICAToN FILED 113.17, 1909.

l 9 *i 6 9, 576 s Patented Aug. 5, 1913.

@WW1/Leases: nvemtoz LEON J. LE PONTOIS, OF NEW ROCHELLE, NEW YORK, ASSIGNOB OF ONE-'HALF TO BENJAMIN HURD, OF NUTLEY, NEW JERSEY.

CARBURETER.

Specicaton of Letters Patent.

Patented Aug. 5,1913.

Application led February 17, 1909. Serial No. 478,422.

-citiYen of the Republic of France, residing at New. Rochelle, in the county of VVest-- chesterl and State of New York, have inf vented certain new and useful Improvements in Carbureters, of which the following lis a full, clear, and exact specification.

This invention relates to carbureters, and has particular reference to carbureters of' the type wherein at a certain engine speed,v an auxiliary air valve is opened t0 permit a greater'y proportion of air in proportion to gasolene to be admitted into the mixing? chamber of the carbureter. In such ca1 bureters diiiiculty has been found in regulating the action of the air valve, since at one instant it is subjected to the vacuum produced by the engine piston and opened quickly, and at the neXt instant this pres-- sure is suddenly relieved so that the valve quickly closes. This quick opening and closing of the valve is objectionable for the reasonthat it renders the mixture uneven and is also noisy.

It is the object of this invention to provide, in combination with the air valve of a. carbureter, a dampingmeans whereby they vibrations of the valve are slowed down and its action renderedl more uniform,

whereby a more uniform and reliable mix-v turev will be produced.

In I carrying out my invention I have provided, in combination with the air valve of a carburetor, a magnetic damper comprising a permanent magnet and a damper carriedl by the stem of the air valve and movable in the field of the magnet so tha-t the reciprocatory movements of the valve lwill be controlled by the magnetic damper.

The invention will be more-fully -underv stood in connection with the description of the accompanying drawings, wherein- Figure l is a vertical section of a carbureter embodying the invention, Fig. 2is a .horizontal section through the damping .device, and Fig. 3 is a detail seengf'rom'beneath of the main air inlet.

1 represents a float chamber having' a passage 2 leading from a source of fuel supply, not shown, which passage 2 is controlled by a float operated valve 3.

' 5 is a oat sliding on the stem 4 of valve 3 and serving to lift the valve by means of a .collar 6 and small levers 7-pivoted at 8, whose short ends 9 engage the collar 6 to lift the valve. Whenever the-level of gasolene in the chamber 1 falls suiicientlyx-ito allow the float to rest on the ends7`ofthe levers, the valve stema-will be lifted and gasolene permitted to ow into thel eat chamber until the float rises sulilciently to allow the collar 6 to overbalance the lever 7 and close the valve. From the Heat cham ber l 'gasolene passes through a needle Valve 10 to a passage l1 contained yin a bridge piece l2, and leading to av nozzle 13. seen, the needle valve 10 is carried in the carburetor casing between the lioat chamber .and the nozzle, and can be adjusted from above by means of the screw 14 in the eet nut 15.

17 is the air inlet space leading to the prmary mixing chamber 18 immediately above the nozzle 13,*from which mixing chamber-v 18 the gas passes vupward through a chamber 19 to pipe 20 containing-the throttle 21,

and .thence to the engine, not shown.

1When the engine is running under normal conditions, the parts above described, with proper adjustment of the needle valve, provide a mixture of right proportions, but when the speed of the engine is increased it is desirable to provide an additional 'air supply, which air supply is' controlled by a valve which remains seated until the engine reaches a predetermined speed. If the auxiliary air valve be an ordinary spring-controlled check valve, 'it is o edduring every suction stroke of the engine and closed during the remainder of the cycle, and as these actions'of the valve occur very `rapidly owingto the inertia of. the valve there will be an objectionable chattering of the valve and also irregularity upon slight variation of the en 'ne speed.. The result is that the composition of the mixture at speeds where the auxiliary air supply is desired, is uneven, at one time there being too much air and at another time too little.

As Will be It is an object of this invention to provide, in conjunction with an ai-r valve, a

damping arrangement whereby the period during which-the valve is opened is prolonged, a more even mixture produced, and easier seatingY of the valve eiiected. ln attaining this object I have provided, in' com- 'bination'witha' normally seat/ed air valve,M

. .A afmean open position 'depending on'therlxnan-v f ovacuu'ni corresponding to variations in the a magnetic damper whereby the friction involved in the use of dash pots and similark devices is entirely eliminated.

24 represents an auxiliary air passage con- 5 trolled by a valve 25 carried on a stem 26 and normally held seated to close the passage 27 by means of a spring 28, the tension of which can'be adjusted'by the screw 29. When the engine reaches4 a speed predetermined according to the tension of the spring 28, the valve opens and admits an additional supply of air into thev secondary mixing chamber 19 to further dilute the charge first formed in the mixing cham- '.ber 18. In order to dampen the movement for the .valve 2 5, there is mounted on the frame zconta'ining'the auxiliary passage 24 an annular permanent magnet 3l having poles N, S. This' magnet is preferably coinposed of .individually magnetized laminas divided into two or more sections by a nonmagnetic ring o-r rings 32, the laminae and the Drings being'secured to the support by/ screws 33. Bv dividing the magnet into sec- 25 v tor are'stronger. Separated from the pol of the magnet 31 and surrounding it is a .soft iron or magnetized steel ring 34 carried by the brass or non-magnetic support 30, and through which the ma etic circuit of the magnet 31 is closed. T e lower end of the valve stem 26 is threaded, and screwed thereon is'a hub 37 carryin a damping device 38 com osed ofcon ucting material which exten s' upwardly between the poles Although-'fthe construction 'shownis'-.pf-

erabl'e, owingA toits compactnessg it evi-1 1 dent that any-'electrical.eonductormovedkby l :the valve-in a magnetic. eld...would produce `51S Similar results. It will'thus; bessen that the valve-will not" be subject tothe same'- rapid uctuation and vibration, that., "t"

" ot lerwise-would, and that it tends to ass al'ysupplyv of air willfbe-fprovided.

t 'eky fuse of a ma tic damper. it will iat-avery lig t construction of air tions, the induced currents in the conduc- .the-'lair gap between the ma the stationary magnetic con uctor. engine speed, and alsov a more` even 'auxillfwill not beisubj'ect t0,l the same deterioration and shock, by reason of the cushioning edect of the damper. Furthermore, there is not the same loss by friction as there is in mechanical retarding,y devices, and the valve being much lighter is much more sensitive to. the liuctuatio-ns of pressure, and therefore capable of Ymore accurate adjustment. The in/ention as herein described is capable of ap lication to other structures than those speci cally described herein, aud various modifications and changes may be made without departing from .the scope of the invention.

Having thus described my invention, I declare that what I claim as lnew and desire to secure by Letters Patent, is i 1. The combination in a carbureter Witha valve mounted to be unseated by variations of pressure, of electro-inductive means effective by the movement of the valve for regulating 'such movement.

2. The combination in a carbureter, of a lvalve mounted to be unseatedby variations of pressure, and electro-inductive means et'- fective by the movement of the valve .for

regulating such movement.

I3.'The combination in a carbureter with a vibratory air valve mounted to be unseated by variations of pressure, of electro-inductive means for regulating the vibrations of said valve and tending to cause it when open to assume a mean position varying with the actuating pressure.

4. The combination in a carbureter with a valve adapted to supply air, of means connected with the valve stem and moving vin a magnetic field whereby to regulate the degree of movement of the valve.

, 5. The ,combination in a carbureter, 'of an auxiliary inlet, a vibratory pressure operatedvalve controlling'said auxiliary inlet, ainagnetadjacent the valve stem, and a col operating element carried by the valve stem andimov'able in the ma etic eld.

6.' The combination 1n a carbureter with a valve, of a permanent magnet, a stationary magneticl conductor separated from the 'rma/griet' poles, and an electric conductor in said space and operated by the 'A '.7".`3I `he combination in a carbureter with y avalveadaptedl-to supply air when opened by thefe 'ne suction, of a permanent magnet,

`a stationary magnetic conductor surroundin'gk-thenmagnetand separated therefrom,

",and' an electrical conductor carried by the lve stem comprising a ring interposed in et poles and '8. The combination in a carbureter with lli 9. The combination in a carbureter with an air valve 'adapted to open in one direction by pressure, of a permanent magnet divided into sections, a non-magnetic element carried by the valve stem and inclosing the magnet, and a stationary armature surrounding said element.

10. The combination in a carbureter with an air valve adapted toopen by pressure, of amagnet and aconductorin the magnetic field, and connections causing relative move ment between the conductor and the magnet When the valve moves, whereby to regulate the valve movement and prolong its period.

l1. The combination in a carbureter, of

a reciprocatory, pressure operated Valve,- and electro-dynamic .means` including -a part reciprocating With'sald valve for regulating the movements thereof. A

12. The combination in a carbureter with a vibratory 'valve tending normally to close and opened by air pressure, of a magnetic element and an electric conducting element movable relative to said magnetic element and coperating .therewith upon relativel movement to produce by electro-induction a force acting to reduce the normal amplitude of vibration 'of the valve as the resultant actuating force varies.

13. Thev combination in a carbureter with a vibratory valve tending normally. to close and opened by air pressure, of astationary magnetic element and an electric conducting element carried by said valve, said magnetic element and said electric conducting element coperating upon VibrationA of saidv valve to produce by electro-induction a retarding force effective to equal degree in both directions in reducing the normal amplitude of vibration of the valve as the re sultant of the opening and closing forces vary.

yIn testimony whereof I aiiix my signature in presence of two witnesses.

LEON J. LE PONTOIS.

Witnesses:

J S. Woos'mn, Gro. Krim. 

